Srinivasan Samuel Raj, Mathew Mebin George, Jayaraman Jayakumar
Dr. Srinivasan is a dental student, Faculty of Dentistry, McGill University, Montreal, Quebec, Canada;, Email:
Dr. Mathew is an associate professor, Pediatric and Preventive Den- tistry, Dentistry, Christian Dental College, Ludhiana, Punjab, India.
Pediatr Dent. 2023 Mar 15;45(2):117-124.
The purpose of this study was to evaluate and compare the long-term clinical retention and gingival health of prefabricated zirconia crowns (PZCs) in primary molar teeth cemented using three luting cements.
Primary molar teeth restored with PZCs (n equals 30 per group) were cemented using glass ionomer cement (GIC), resin-modified GIC (BioCem™), or adhesive resin cement (APC technique: air- particle abrasion, zirconia primer, composite resin). Crown retention, plaque accumulation, and gingival status were evaluated over three years; cumulative crown survival was assessed using Kalpan-Meier analysis. Plaque gingival scores were analyzed for within and between groups using repeated measures one-way analysis of variance.
The survival of PZCs cemented using GIC was 76.7 percent, 70 percent for APC, and 50 percent for BioCem™ after three years. The mean survival for PZC in the GIC group (35.5 months) was significantly higher than for APC (34.7 months), and BioCem™ (33 months; P=0.019). Plaque accumulation around GIC-luted crowns was significantly lower (P<0.001; three-year follow-up); gingival outcomes were uniformly favorable between groups. No crown fracture was observed throughout the study period.
Prefabricated zirconia crowns cemented using traditional glass ionomer cement have superior retention and lower plaque accumulation compared to BioCem™ and APC after three years. PZCs provided long-term favorable gingival health outcomes irrespective of the cement used for luting the crowns.
本研究旨在评估和比较使用三种粘结水门汀粘结的乳牙预成氧化锆冠（PZCs）的长期临床保留率和牙龈健康状况。
用PZCs修复的乳牙（每组n = 30）分别使用玻璃离子水门汀（GIC）、树脂改性GIC（BioCem™）或粘结树脂水门汀（APC技术：气粒磨蚀、氧化锆底漆、复合树脂）进行粘结。在三年时间里评估牙冠保留率、菌斑堆积和牙龈状况；使用Kaplan-Meier分析评估累积牙冠生存率。使用重复测量单因素方差分析对组内和组间的菌斑牙龈评分进行分析。
三年后，使用GIC粘结的PZCs生存率为76.7%，APC为70%，BioCem™为50%。GIC组PZC的平均生存时间（35.5个月）显著高于APC组（34.7个月）和BioCem™组（33个月；P = 0.019）。GIC粘结的牙冠周围的菌斑堆积显著更低（P < 0.001；三年随访）；各组间牙龈结果均良好。在整个研究期间未观察到牙冠折断。
与BioCem™和APC相比，使用传统玻璃离子水门汀粘结的预成氧化锆冠在三年后具有更好的保留率和更低的菌斑堆积。无论使用何种水门汀粘结牙冠，PZCs都能提供长期良好的牙龈健康结果。
